Manatee Springs
Manatee Springs is an excellent site to scuba dive or snorkel.  This picturesque park is owned by the state and C-Cards are checked at the gate if you wish to scuba dive.  No dive lights allowed without cave certification.  This large basin has a steep limestone cliff that drops down to a cavern entrance at 40 feet. that quickly turns into a cave dive.  200 yards away is Catfish Hotel Sink.  This sink is covered with Duckweed and has a cave system that has been linked to Manatee Spring.  Depths stay around 35 feet.

Take US-19 north from the town of Cheifland, turn West on S-320 and follow the signs 6 miles to the entrance of Manatee Springs State Park.
Manatee Springs basin